Answer is 8
Work Shown:
f(x) = sqrt(5*x + 4)
f(12) = sqrt(5*12 + 4) ... replace every x with 12
f(12) = sqrt(60 + 4)
f(12) = sqrt( 64 )
f(12) = 8
3 times x equals to 646
3x=646
The parentheses must be placed here 48 - (5 + 2) * 3 + 6 in order for the equation to equal 33.
Solution:
we are given that
If G is the midpoint of FH, it mean that

we are also given that

So we can write

So 
If you are factoring then the answer is 1/7 x (14z-97) but if your simplifying then it’s 2z- 97/7